Improved apparatus for tee atinb offal



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JAMES P. CHE'NOWETH AND EDWIN P. BAUGI'I, 0F PHILADELPHIA, PENN; SYLVA'NIA, A$SIGNORS TOB'AUGH esons, 0F SAME PLAoIa- Letters Patent No. 78,261. datcdllfay so, 1868 IMPROVED APPARATUS FOR TREATING'OFFAL.

TO ALL WHOM xrnirroononnn:

Be it known that we, JAMES B. .Cunno'wsm and Enwm P. Bacon, of Philadelphia, Pennsylvania, have invented an Apparatus for Treating Oii'al, &c.; and we do herebydcelare the following to be a full, clear, and exact deseriptiouof the same. l

Our invention consists'ei' certain apparatus, fully described hereafter, for drying otial, bones, manures, Ste.

7 In order to enable others familiar with apparatus of this class to make and use our invention, we will now proceed 'toldcscribe its. construction and operation, reference being bad to the aceompanying drawing, which forms a part of this specification, and in whichi l I Figure 1 is a side view, partly in section, of our improvedapparatns for treating ofi'al, 8L0.

Figure 2, a vertical section of the same.

Figure 3 a plan view, and

Figure ia transverse vertical section on the line 12, fig. 1.

Similar letters refer to similarparts throughout the several views. a

Arepresents a chamber or-even of brickwork or of other suitable material, the interior of which is divided by h partition, 0, into .two compartments, 6 and 11, the latter compartment communicating at the top with a chimney, B, the entrance to' which can be opened or closed by a damper, d, and the compartment 6 communicating at one side, and close to its rear end, with a fireplace or furnace, C.

A horizontal cylinder, D, passes through openings in the rear wall 0, andthrough the partition (I of the oven, and rests upon and is arranged to turn on anti-friction rollers c e secured to the said wall and partition, and motion .is communicated to this cylinder by means of its cog-wheel which gears into a pinion, f, of a driving-shaft, E, (see figs-fiend 4.) I

Thefront'open end of the cylinder D'entcrs the compartment b of the oven, and into this end projects an inclined spout or chute, g, which is secured to the front wall 0' ofthc oven, and directly over this spout is hung a valve or door, 11, opening inwards, as shown by dotted lines, fig. 2.

A rib, z, is secured to the inside of the cylinder,.imd extends through the same in a. spiral course, as shown in fig. 2, and in the sides of the cylinder, close to its rear end, are openings, j, for a purpose described hereafter.

At a short distance'i'rom the rear end of the oven A, and placed, in the present instance, side byside, are two fans, F F, driven independently of each other by straps passing round pulleys k'at'the outer ends of their spindles.

Communicating with the foul are two pipes, and Gf, the former, which is an exhaust-pipe, servii'ng as,

a communication between the fan and the interioroi the compartment 6 of-the oven, and' the blast-pipe G passing through an opening in the rear end of the cylinder D, and projecting into the said cylinder to a point beyond the openingsj, (see fig. 2.) i

'H is the enhaust-pipeof the fan F, and communicates with the compartment 6, and the blast-pipe 11' or the some fan communicates with the ash-pit of the fireplace C. A v

The cylinder D being caused to revolve in the direction of its arrow, and the fans beiugsetin epcration, and a fire having been kindled in the furnace C', the heat, smoke, and other products of combustion pass into the compartment b of the oven, and, "after circulating through the same, and around, and in'cont act with the surface of the revolving cylinder D,=pass through the exhaust-pipe G to the fan F, and are driven by the latter, throughthe pipe-G, into the cylinder D, thencethrough the latter and into the compartmentb of the even, from which, if the damper d be open, they are discharged into the chimney B. K v

'It,'hlowever, the damper be closed, the products of combustion will be caused to'pass'through the exhaustpipe H to thefan F, by which they will be driven forcibly throughthe pipe H into the ash-pit of the firelace C. i

p The bones, ofi'al, manure, or other material to-be' dried, are passed into the cylinder through the spout or a g 1 10,261 chute g, the door It opening inwards, as shown by dotted lines, 15g. 2, to allow the material to pass, bnt'elcaing' again by the force of the blast from the fan F, when a suhicie'nt quantity has been admitted into the cylinder.

Within the latter the material is exposed to tbe action of the hot blast from the-fan F, and to the sides of the cylinder, which are highly hcatc'd, in order to prevent any of the rn'aterial"from adhering to them. The material, while thus exposed, is at the same time thoroughly agitated, and tbroivn from side-to side oi the revolving cylinder, and is carried towards the rear end-of the same against the blast by the action ofthe spiral ribs, whiletho disengaged steam and offensive gases are carried back by the blast towards the front end of the. cylinder. The material,- therefore, as it moves towards the openings j, advances constantly iiito a drier atmosphere. p

I The mat erial, having passed through the cylinder, drops from the'opcnings jinto a suitable receptacle placed-beneath to receive it, andfif it is not suiiicicntly dried, theforco of the hot blast is increased, in order to retard the material in its passage through the cylinder, and so expose it'i'or a longer time to thoaction of the heat within the same p I If, on the other hand, the material passes from the openings j in too-dry a state, the'i'orce of the blast is diminished, the material then, owing 'to the unobstructed action of the spiral rib z',',passing through the cylinder more quiclrly. v I 7' The steam andoffensive gases which are liberated'fromxthe drying-material p'ass, togethern'vith the prod. nets of combustion composing the hot blast, into the compartment b of the oven, and, if the dampcrd be closed,

they enter and passthrough the p'ipo'H to the {an F, by which they are driven intothe ash-pit of the furnace C, as before described.

The gases rise through the grate of the furnace into the fire, and are wholly or partially consumed before again passing into the compartment 6' of the oven. 7

Inisome instances it may not benecessary to consume eitli'er thcoii'ensive gases or the products of combustion, in which case the pipes H 'andH', and fan F, may be dispensed with, and thegases permitted to escape through the chimney 13.

It will be evident that, by 'a slight change in the construction oi: the apparatus, a blast of pure h'ot airiinny be forced through thecylipder, instead of the heated products of'coinbustion, in-cases where the latter might deteriorate the'material to be dried, Q

The most important feature of our invention isthe exposure of tho cxterior of'the rcvolving cylinder to the heat at the same time that the-products of combustion or heated air pass through the cylinder.

The external heat prevents the adhesion of the oii'al to tlie interio'rof thecyliridcr, the revbiution'of which agitates the loose particles 0! edit], and subjects every portion'oif the some to the action of the internal blast of heated air or products of combustion. V

We claim' as'our invention, and desire to sceure by Letters Patent- 1. Treating ofl'al by subjecting it, in a. revdlving cylinder, or its equivalent, to the combined action of heat applied to the outside of the cylinder, and to'ablast of'heatedmir or products of combustion introduced into the cylinder, all substantially as and-for the purpose herein set forth.'-

2. The revolving cylindcr-D',-constructed substantially as described, in combination. with a fireplace, 0, even A, and pipes, passages, and fans, or equivalent devices, whereby the surface of the said cylinder is heated, and a hot blast forced through the interior of the same,'in the manne'rand for the purpose heroin set forth.

3. The spiral rib z', hav ing a tendency to force the matcrinlthrough -the cylinder in a direction opposite to the course of the hot blast, as described. i I I g '4. The pipes Hand H and the fan F, arranged, in respect'to the furnace C and compartment 6 of the oven, substantially as herein described for thepurposo specified.

In testimony whereof, we have signed our names'to this specification in the presence of two subscribing witnesses.

JAMES B. CHENOWETH, EDWIN P. BAUGI-L' Witnesses:

Jofin Wnrrn, G. B. Paton. 

